so i got my girlfriends old bike to sell and i have no idea what its worth? its a 1988 xr 100 :fmf pipe :new back tire :hand guards :new grips :bent pro taper bars lol i know all of that stuff means nothing when it comes to selling a bike but i thought id let you guys know. . . thinking 800 obo on craigslist and be happy if i get 600? sound right?